FYI: "There's no markup in the game". Meanwhile the auction... (one of the most important lessons in the game: auction house)

[Xen]

Good advice, but I think a lot of people don't have much bankroll and need stuff to sell quickly so they can hunt again. And I don't think this will change much. But bankroll is very important so you can avoid this and every player should try as much as they can to increase their bankroll or decrease their cycle so they aren't losing as much money on the auction. Then again, some people have a lot of money to burn and you can see them doing large, unnecessary undercutting auctions all the time.